@Gary Lawson
When I evaluate properties for cash flow I do have a minimum acceptable amount per unit to start with. $100 per unit for multi family and $200 for single family. However, I also look for properties that I have room to raise rents after the Rehab. As @Josh Stanley suggested I have made adjustments for BRRRR deals and lowered the Refinance loan amount in order to improve cash flow to an acceptable minimum. I do not want to make that a common practice since I am trying to reuse the same bucket of money over and over again.
As far as knowing what expense amounts to use. It can be a little more simple than you might think. I start my initial screening analysis using 55% for expenses and current rents for income. If they pass the initial looksy I start using individual expense estimates for a little more closer look. Yes, I use 10% for CapEx. Once the property is under contract I have it inspected to determine the current condition and life expectancy of all major components and appliances. I use this report and and the draft SOW to determine what will ultimately be included in the Rehab and what can be deferred. In most cases my reserves requirement is lower than the original 10%. My investment practice is to only hold properties for approximately 5 years. Then 1031 exchange them for larger ones. So anything not expected to last a minimum of 5 years is included in the Rehab.
For Vacancy I can care less how low a Seller or market average is. I maintain a minimum of 8.34% in my analysis and budgeting. That covers one months rent. If the actual vacancy amount ends being lower then I made more money that year.
PM averages 10%.
Maintenance reserves depend on the age/condition of the property and the quality of tenants. I like a minimum of $50 per unit.
You can get free quotes for insurance.
Taxes are easy to find.
Utilities. Call the servicing Utility to get an average on the property.
Once you get a property under contract you will be digging deeper during the due diligence.
Holding costs include (but not limited to) loan payments, insurance, taxes, utilities, HOA fees, etc., that occurs during the Rehab period and up until the property is fully rented. This includes negative cash flow. I routinely use $6,000 initially for Holding Costs estimates for my analysis.
Gary, be sure you understand what is considered CapEx and what is OpEx (Repair/Maintenance) in your Rehab. It makes a difference from a tax perspective.
I agree you seem to be going in the right direction with your analyzing.